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105a_ch03L6_L8_06

105a_ch03L6_L8_06 - Exam 1 Thurs Sept 14 3:30-4:30 p.m...

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1 Exam 1: Thurs. Sept. 14, 3:30-4:30 p.m. ROOMS: A-G SGM 101 H-Z SGM 123 Bring a watch -- electronic devices are not allowed (cell phones, pagers, etc.) and the rooms do not have clocks. Bring your Casio FX-260. No other calculators are allowed. (Be sure to do your HW with this calculator so you know button locations and in which order to push the buttons, before the exam -- otherwise it could slow you down on your exam.) Bring your photo ID. Your ID will be checked during the exam. Bring a black pen. Pencils are not allowed. Do not use whiteout. Left-handed students have priority at the left-handed seats. The exam is 60 minutes, please arrive early, sit every-other-seat, and avoid sitting diagonally behind someone. No one may leave early. If you have special needs, please see Dr. Erickson ahead of time.
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2 L6:II. Stoichiometry (Chap 3) A. Relative atomic masses 1. Atomic mass units 2. Natural abundance 3. Mass spectrometer and the mass of an atom B. The mole 1. Rationale 2. Avogadro's number 3. definition of the mole 4. Sample problems 5. Formula mass C. Determining percent composition D. Determining empirical and molecular formulas E. Simple Chemical Equations 1. Definition 2. Balancing simple equations F. Stoichiometric calculations 1. Amounts of reactants and products 2. Limited reagent 3. Actual and theoretical yields Avogadro ' s no . = 6.02214x10 23 molecules / mole Mass ( molecule ) = mol . wt .( gr / mole )/ N av ( molecules / mole )
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3 Chemical Stoichiometry Stoichiometry - The study of quantities of materials consumed and produced in chemical reactions. The chemical engineer calls this " mass balances "
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